package com.sky.service.impl;

import cn.hutool.core.util.ObjectUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 修改密码
     *
     * @param passwordEditDTO
     */
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        //如果新密码为空,不能进行修改
        if (ObjectUtil.isEmpty(passwordEditDTO.getNewPassword())) {
            return;
        }
        //拿到员工密码进行比对是否是正确的密码
        Long id = BaseContext.getCurrentId();
        String oldPassword = employeeMapper.findOldPassword(id);
        if (!(oldPassword.equals(passwordEditDTO.getOldPassword()))) {
            BaseContext.removeCurrentId();
            throw new PasswordEditFailedException("原始密码不正确~~,请仔细检查哦~~");
        }
        employeeMapper.updatePassword(passwordEditDTO);
        BaseContext.removeCurrentId();
    }

    /**
     * 分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult findByPage(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> employees = employeeMapper.findByPage(employeePageQueryDTO.getName());
        return new PageResult(employees.getTotal(), employees.getResult());
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void addEmployee(EmployeeDTO employeeDTO) {
        //判断是否为空
        if (ObjectUtil.isNull(employeeDTO)) {
            return;
        }
        employeeMapper.addEmployee(employeeDTO);
    }

    /**
     * 根据id查询
     *
     * @param id
     */
    @Override
    public EmployeeDTO findById(Integer id) {
        EmployeeDTO employeeDTO = employeeMapper.findById(id);
        return employeeDTO;
    }

    /**
     * 修改员工信息
     *
     * @param employeeDTO
     */
    @Override
    public void updateEmployeeInfo(EmployeeDTO employeeDTO) {
        //判断前端传过来的数据是否为空,为空则不进行修改
        if (ObjectUtil.isNull(employeeDTO)) {
            return;
        }
        employeeMapper.updateEmployeeInfo(employeeDTO);
    }

    /**
     * 启用、禁用员工账号
     *
     * @param status
     * @param id
     */
    @Override
    public void updateEmployeeStatus(Integer status, Integer id) {
        employeeMapper.updateEmployeeStatus(status, id);
    }
}
